Valve for carburetors



Oct. 5, 1943. BAUERNSCHWD 2,331,161

VALVE FOR CARBURETOHS Filed Aug. 14, 1941 Patented Oct. 5, 1943 UNITED"s r-Ares PATENT OFFICE.

to Chandler-Evans Corporation, a corporation of Delaware Application: Auust '14, 19h," Serial Nb. j oavs sig 14- o1aims (Grim-r2) .1

1. My inventionirelatesxto v'alves fcr carburetors. It has among itsobjects to provide animproved throttle mechanism for, carburetors and;more rti u y, such a throttle mechanism especially adapted cause inconnection with airplane car- I buretors. A further object of myinvention is to providesuch a throttle mechanism adapted to. use insucha carburetor having large rectangular'air p ssage means leadin tothe engine and adapted to control the air flowtherethrough t the enginein an improved manner; Other objects tot my invention are toprovide sucha throttle. mechanism having throttle members of an: improved.construction; and j ournaled in an improved manner at their oppositeends and intermediatev their ends, and also havingimproved sealing meansfor the throttle members attheextremities thereof and adjacent theintermediate journal thereof. Other objects and advantages ofmy;.improve-. ments will hereinafterrnore fully appear.

In th accompanying drawing, I have shown for purposes of illustrationone embodimentwhich my invention may assumeinpracticet I g Inthisdrawing:

Figure 1 is an end elevation, partially'in section, of a carburetorequipped with myimprovement; a

Fig. 2 is an enlargedsectional view on line 2-2 of Figure 1; 'l f f Fig.3 is an enlarged detailsectional View on line 3-.3 of Figu'rel; i

Fig. 4 is a detail; partiallyin section, showing one of the. end sealsand its associatedjournal mechanism and a I a Fig. 5 is a section online[ 5--5 of Figure l' on a somewhat reduced scale showing the'throttle members in the fully open position shownin Figure .7

In this illustrative construction, I have shown my improvements embodiedin a carburetor cas ing l havinga rectangular air"flow passage 2therethrough; my improved throttle members,

gen'erallyindicated at 3,;being adapted to control the air flow throughsaid passageand' journaled at their ends in the casing l andintermediate their ends in a transverse septum 4 in thepa'ssa'gez'between the fuel inlet or fuel bar 5 and "suitable rectangular Venturimechanism; generally indicated at 6, and said'throttle members 3 beingoperated from any suitable operatingmember 1 through usual cooperatingmeshing geared-sec-' t0rs8.

Referring more particularly to the throttle members 3, it will bevnotedthat each ofv'thesame comprises a shaft S carrying at longitudinallyspaced thereonlel ongated generall e 1lip. tical hollow members It!suitably fixed as by-rivets It to theshaft 9 and tapering, therefrom. to

parallel edge portions .12 to provide. generally elliptical. hollowthrottle members. As shown, each otthese-members H! abuts at itsoppositeend an annular memberv or disc 13 and has [each edge-l2 of thethrottle-member extended slightly beyond theperiphery of this disc. Ofthese. discs 'l3,.the discs at the inner ends of the'kthrottle members10 fit snugly on the shaft 9 and abut opposite sides o'f'a, middlebearing sleeve [Lfixed to this shaft as by a rivet l5- Herein, thissleeve it is journaledin split bushings l6 heldtogether by a springringI] and mounted in a transverse aperture [8 in the transverse septum 4.The

discs I3 at thev outer ends of the throttle members,

on theother hand, are carried on reducedpor tions l Son the shaft9andabut ball bearings 20 carried on asmaller bearing sleeve 21 on anadjacent reducedportion 22 of the shaft.

.O peratively associated with each end of each.

throttle member, and, more particularly, with the disc l3 at each endthereof, is improvedsealing means.v Herein, these sealingmeans attheinner ends of the. throttle. members include peripheral flanges 23 onopposite, sides of the split bearing members 16, receiving and providingjournals for the peripheries of the discs I3. Similarly, at theirouterflends, the throttle members have their discs l3 journaledinperipheral flanges on cup memhers/25 and-26 receiving the .ballbearings 2 llan'd suitably fixed to suitable end plates 21 and 28attachedto the casingv I. Herein, the cup25, which is adjacent the gears8, ,,is longer than the cup ZB andha a lurality' of oppositely disposedloading springs 29,:betweenthe end wall O the same and the ball bearing2!], 'a like construction being provided on the right hand ends of bothshafts 9. The cup 2Q, on the other hand, snugly fits agal'nsttheendofthe bearing 20' and has a single'loading spring 30 carried onecollar 3| suitably fixed to the shaft. and positioningthe,bearing 20;,this spring herein acting against-= afsuitable abutment face 32 onthefend pl ate;28, and'a suitable washer 33 and packing seal 34 betweenthesame'and the end of the'cupf A t thisend of'the shaft 9 which alsoc'arries the operating member 1,; a packing gland 35' is also providedaround are'duced portion on the shaft 9an'd held in sealing position byacoiled spring 36 acting between the'same andianabutment 31 fixed to anadjacent portion of thezshaft 9. The like endof the othershaft 9, whileprovided with a like cup 26; has no seal or springs, asshown irrFigure3. r a

In the use of the throttle members, it will be apparent that as the sameare rotated by their operating member I and gears 8, the shafts 9 willrotate in their ball bearings at the opposite ends of the shafts, whilethe sleeves I4 provide journals intermediate the ends of the shafts.Further, the discs [3 provide sealing means at opposite ends of eachthrottle member I, these discs rotating inside their cooperatingperipheral flanges 23 and 24 in such manner as to prevent the passage ofair through the throttles at either end of either throttle member [0.Attention is also directed to the fact that the sealing relation betweenthe discs and annular flanges is maintained by the loading springs 29.,these double loaded springs acting to maintain the desired sealingrelation, despite longitudinal expansion or contraction of the parts.Attention "is also directed to the fact that these springs further actto take up wear at the opposite ends of the shaft and thereby maintainthe desired seal-ing relation.

As a result of my improved construction, effective seals are provided atthe ends of the throttle members in such manner that with the sealspreviously provided along the outer edges of the throttle members, anyleakage along either the ends or sides of the throttle member iseffectually prevented. At the same time, it'is made possible to providethe throttle members in the form of light, hollow bars and also tojournal the same, not only at their ends, but between their ends in suchmanner as to insure proper operation of the same under all conditions.Attention is also directed to the facility with which the throttlemembers may be assembled, it being possible, after the assembly of oneend plate, as, for example, the end plate 21, to slip the throttle barassembly into the operative position illustrated in Figure 2 andthereafter to insert the cup 26 and spring .32, after which the endplate 28 may be secured in position. These and other advantages of myimproved construction will, however, be clearly apparent to thoseskilled in the art.

While I have herein specifically described one embodiment which myinvention may assume in practice, it will be understood that the samehas been shown for purposes of illustration, and that the invention maybe modified and embodied in other forms Without departing fromits spiritor the scope .of the appended claims.

What I claim as new and desire Letters'Patent is:

1. In a carburetor, a casing having air passage means, a throttle memberin said passage means and journaled in said casing, and sealing meansfor the opposite ends of said member, each of said sealing meansincludin cooperating cup and cup closure members, said cups being ,fixedto said casing and surrounding said journals and said cup closures beingrotatable with said member and axially movable in said cups.

2. In a carburetor, a casing having air passage means, a throttle memberin said air passage means and .journaled in said casing, sealing meansfor the opposite ends of said member having cooperating elementsrespectively carried on the walls of said air passage means-surroundingthe member journals therein and on said throttle member around h axisthereof, and spring means acting on one element of said sealing means.for maintaining said sealing means in sealing relation.

3. In a carburetor, acasing having air passage to secure by means, athrottle member in said air passage means and journaled in said casing,cooperating sealing elements for one end of said member, one carried bysaid casing and surrounding the journal therein and the other by saidmember and surrounding the axis thereof, and oppositely acting springmeans for maintaining said sealing elements in sealing relationirrespective of relative longitudinal movement of the parts due totemperature variations.

4. A throttle member for carburetors comprising a shaft, a journalcarried on said shaft intermediate the ends thereof, discs spacedlongitudinally on said shaft at opposite ends thereof and at oppositeends of said journal, and generally rectangular throttle membersenclosing the portions of the opposite ends of said shaft between thepairs of discs on opposite sides of said journal.

5. A throttle member for carburetors comprising a shaft, a journalcarried onsaid. shaft intermediate the ends thereof, discs'spacedlongitudimany on said shaft at opposite ends thereof and at oppositeends of said journal, generally rectangular throttle members enclosingthe portions of the opposite ends of said shaft between the pairs ofdiscs on opposite sides of said journal, and sealing means between saidjournal and the discs adjacent the latter.

6. A throttle member for carburetors comprising a shaft, discs spacedlongitudinally on said shaft, a generally rectangular throttle memberenclosing said shaft between said discs, and sealing meanscooperatingwith said discs at opposite ends of said throttle member and having openends in which said discs are axially movable.

'7. A throttle member for carburetors comprising a shaft, discs spacedlongitudinally on said shaft, a generally rectangular throttle memberenclosing said shaft between said discs, bearings at opposite ends ofsaid shaft adjacent said discs, and sealing members enclosing saidbearings and said discs and having the latter axially movable in saidsealing members.

8. A throttle for carburetors including a throttle shaft, longitudinallyspaced generally rectangular throttle members thereon, an intermediatejournal member between said throttle members, end journal means atopposite ends of said throttle shaft, discs at opposite ends of eachthrottle member and carried on said shaft between said throttle membersand said intermediate and end journal means, and sealing meanscooperating with said discs including flanged cups housing said endjournal means and oppositely directed flanges on said intermediatejournal means.

.9. ,A throttle for carburetors including a throttle shaft,longitudinally spaced generally rectan'gular throttle. members thereon,journal means between said. throttle members compris ing a journalsleeve enclosing said shaft between said throttle members, discs betweenthe opposite ends of said throttle members and said sleeve, andcooperating split journal members enclosing said sleeve, and spring.means holding said split journal members insaidenclosingrelation.

10. A throttle for carburetors including a throttle shaft,longitudinally spaced generally rectan ular throttle members thereon,journal means between said throttle members comprising a journal sleeveenclosing said shaft between said throttle members, discs between theopposite ends of said throttle members and said sleeve,

cooperating split journal members enclosing said sleeve, spring meansholding said split journal members in said enclosing relation, andsealing flanges on Opposite ends of said split'iournal memberscooperating with said discs.

11.- In a device such as described, a casing having a passage with aplanar limiting wall, a shaft Q journaled in said wall" in perpendicularrelation sealing elements being capable of relative axial movement.

12. In a carburetona casing havinganair passage therethrough, a throttlemember in said air passage journaled in said casing, and sealing meansfor an end of, said throttlemember including cooperating cup andcup-closure elements, one of said elements being carried by the casingand surrounding the journal therein, and the other-being carried by thethrottle memberand surrounding the axis thereof and axially ovable withrespect to said first sealing element;

13. In a device such as described, a casing having a passage with aplanar limiting wall, a shaft having an end journaled in said wall, aflap valve carried by said shaft'and provided with sealing meansconstituted, by an end wall in close proxv imity to the planar wall, andadditional sealing means in the planar wall, said two sealing'meansbeing relatively axially movable.

14. In a device such as described, a casing having a passage with aplanar wall, a' shaft perpendicular to said wall and journaled therein,-a

flap valve on said shaft havingan end wallin close proximity to theplanar wall, and a sealing member receiving the end wall of the valvelocated in a recess in the wall around the shaft, said shaft and saidsealing member being relatively axially movable, and means exertingaxial pressure on one of'said last-named elements.

PAUL P. BAUERNSC'HMID.

